Company has filed foreclosure action against wrong party, what should I do?

I have no debt other than my mortgage which has never been delinquent. Today, my son tells me a process server showed up trying to serve papers for a Foreclosure on our home. I looked up public records and see a few days ago a Lis Pendens was filed listing some Asset Company as Plaintiff and me, my wife, and my mortgage company as the defendant. They clearly have filed against the wrong party. What should I do? Process server told my son he will be back on Monday.